#include "kbhit.h"
#include <stdio.h>
#include <termios.h>
#include <unistd.h>


static struct termios initial_settings, new_settings;
static int peek_character = -1;


void init_keyboard()
{
    tcgetattr(0,&initial_settings);
    new_settings = initial_settings;
    new_settings.c_lflag &= ~ICANON;
    new_settings.c_lflag &= ~ECHO;
    new_settings.c_lflag &= ~ISIG;
    new_settings.c_cc[VMIN] = 1;
    new_settings.c_cc[VTIME] = 0;
    tcsetattr(0, TCSANOW, &new_settings);
}

void close_keyboard()
{
    tcsetattr(0, TCSANOW, &initial_settings);
}


int kbhit()
{
    unsigned char ch;
    int nread;
    if (peek_character != -1) return 1;
    new_settings.c_cc[VMIN]=0;
    tcsetattr(0, TCSANOW, &new_settings);
    nread = read(0,&ch,1);
    new_settings.c_cc[VMIN]=1;
    tcsetattr(0, TCSANOW, &new_settings);
    if(nread == 1)
    {
        peek_character = ch;
        return 1;
    }
    return 0;
}

int readch()
{
    char ch;
    if(peek_character != -1)
    {
        ch = peek_character;
        peek_character = -1;
        return ch;
    }
    read(0,&ch,1);
    return ch;
}

#if 0

int main()
{
    int ch = 0;

    init_keyboard();

    while(ch != 'q')
    { 
        printf("looping\n");

        usleep(30);

        if(kbhit()) 
        {
            ch = readch();
            printf("you hit %c\n",ch);
        }
    }
    close_keyboard();
    exit(0);
}
#endif